One vertex per element, one color per generator, with an edge from x to x·s.
(1,2,6,7)(3,5,9,13)(4,8,11,14)(10,12,15,16)(17,18,22,24)(19,23,26,32)(20,29,25,21)(27,28,30,31)(33,34,39,36)(35,42,38,40)(37,41,45,44)(43,48,46,47)(4,11)(8,14)(10,15)(12,16)(17,19,22,26)(18,23,24,32)(20,30,25,27)(21,28,29,31)(33,35,39,38)(34,40,36,42)(37,43,45,46)(41,47,44,48)(2,7)(3,9)(8,14)(10,15)(18,24)(19,26)(20,25)(28,31)(37,45)(41,44)(43,46)(47,48) involution — undirected(1,3)(2,5)(4,10)(6,9)(7,13)(8,12)(11,15)(14,16)(17,20,22,25)(18,21,24,29)(19,27,26,30)(23,31,32,28)(33,36,39,34)(35,40,38,42)(37,44,45,41)(43,47,46,48)(1,4)(2,8)(3,10)(5,12)(6,11)(7,14)(9,15)(13,16)(17,19)(18,23)(20,27)(21,31)(22,26)(24,32)(25,30)(28,29)(33,37,39,45)(34,41,36,44)(35,43,38,46)(40,47,42,48)(1,5)(2,3)(4,12)(6,13)(7,9)(8,10)(11,16)(14,15)(17,21)(18,25)(19,28)(20,24)(22,29)(23,27)(26,31)(30,32)(33,38,39,35)(34,40,36,42)(37,43,45,46)(41,48,44,47)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.